envsdotnet-matrix-conf/usr/local/bin/synapse-clear-state.sh
2021-08-01 14:34:00 +02:00

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#!/bin/sh
#
# you dont need to stop synapse.
#
# from: https://jo-so.de/2018-03/Matrix.html#state_groups_stateaufrumen
#
# this script used:
# https://github.com/matrix-org/rust-synapse-compress-state
#
## start task via:
# $ sudo systemd-run --nice=4 -pCPUSchedulingPolicy=batch \
# -pIOSchedulingClass=idle --uid=matrix-synapse --collect \
# --unit=synapse-clear-state ~/bin/synapse-clear-state
#
## watch task-log via:
# $ journalctl -Stoday -u synapse-clear-state -f
#
set -e -u
username='matrix'
db='matrix'
conn_str="host=localhost user=$username dbname=$db application_name=state_compress"
###
export RUST_BACKTRACE=short LC_ALL=C.UTF-8
if which time >/dev/null
then
export TIME='%E elapsed %M rss'
time=time
else
time=
fi
cd "$(mktemp -d)"
echo "Writing SQL files to $PWD"
if [ $# -eq 0 ]
then
set -- $(psql -X -t -A -U "$username" -c 'SELECT room_id FROM state_groups
GROUP BY room_id ORDER BY count(*)' $db)
fi
echo 'Disabling autovacuum on state_groups_state'
psql -X -q -b -U "$username" -c 'alter table state_groups_state set (autovacuum_enabled = false);' $db
no=0
for room in $*
do
echo '--------------------'
echo
sql_file=state-compress-$((no += 1)).sql
echo "Writing SQL commands to $sql_file"
$time synapse-compress-state -t -p "$conn_str" -o "$sql_file" -r "$room" -m 1000
if test -s "$sql_file"
then
$time psql -X -q -b -U "$username" -c '\set ON_ERROR_STOP on' -f "$sql_file" $db
else
rm "$sql_file"
fi
done
echo 'Enabling autovacuum on state_groups_state'
psql -X -q -b -U "$username" -c 'alter table state_groups_state set (autovacuum_enabled = true);' $db
echo 'Running VACUUM and ANALYZE for state_groups_state ...'
$time psql -X -q -b -U "$username" -c 'VACUUM FULL ANALYZE state_groups_state' $db
echo "All SQL scripts are in $PWD"
exit 0